CPC Definition - Subclass H05F
This place covers:
Means for preventing the formation of or removal of electrostatic charges in general, not otherwise provided for.
Using naturally-occurring electricity (e.g. lightning)
As more and more the protection from and the removal of electrostatic charges have become critical in many systems and devices, subclasses have been created in many areas incorporating the scope of H05F, rendering this subclass the last appropriate place for classification.
Spark gaps, sparking plugs and corona discharge devices are classified in subclass H01T.
Electrostatic machines are classified in H02N.
This place does not cover:
Installations of lightning conductors; Fastening thereof to supporting structure |
Specific applications of methods or arrangements for preventing the formation of static electricity or for carrying off these charges after their formation. For example:
Garments protecting against electric shocks or static electricity | |
Footwear with earthing or grounding means | |
Carrying off electrostatic charges from living beings | |
Electric elements specially adapted for carrying off electrostatic charges from vehicles | |
Static discharge and lightning protection for aircraft | |
Arrangements in large containers | |
Structural protection against electrostatic charges or discharges for semiconductor devices | |
Protective earth or shield arrangements on coupling devices | |
Devices providing for corona discharge | |
Screening of printed circuits or components thereof against electric or magnetic fields |
Attention is drawn to the following places, which may be of interest for search:
Domestic cleaning implements functioning electrostatically | |
Cleaning by electrostatic means | |
Apparatus for electrographic processes using a charge pattern | |
Electrostatic machines |
In this place, the following terms or expressions are used with the meaning indicated:
Corona discharge or brush discharge | Discharge from a conductor when the potential difference between it and its surroundings exceeds a certain value but is not enough to cause a spark or an arc. |
Spark gaps | Enclosed or non-enclosed discharge devices having cold electrodes and used exclusively to discharge a quantity of electrical energy in small time duration. |
Coupling devices | Devices having two or more parts specially adapted so as to be capable of ready and repeated physical engagement or disengagement, without the use of a tool for the purpose or establishing or breaking an electrical path. |
Electrostatic charge | They are used as synonyms for the electric charge at rest on the surface of an insulator or insulated body. |
This place covers:
Means that prevent or suppress electrostatic charge build-up.
This place does not cover:
Antistatic coating in cathode/electron tubes | |
Antistatic elements in semiconductor handling |
Attention is drawn to the following places, which may be of interest for search:
Antistatic materials | |
Treatment of fabrics |
This place covers:
Residual main group for removing electrostatic charges not provided elsewhere.
This place does not cover:
Chemical processes involving electrical discharges | |
Electrostatic spraying | |
Purifying air by electrostatic fields | |
Devices providing for corona discharge | |
Apparatus for generating ions into the atmosphere |
Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:
(removal of or protection from electrostatic charge, rec)
Rec in footwear | |
Grounding means for footwear | |
Rec in chairs, beds | |
Rec in electrotherapy | |
Rec in tyres | |
Rec in vehicles | |
Rec in aircrafts | |
Rec from sheets, webs | |
Rec in transfer of liquids from bulk storage into vehicles or smaller containers | |
Antistatic layers in flexible sheet materials | |
Rec in semiconductors | |
Rec in electric connectors | |
Rec in electronic devices |
Attention is drawn to the following places, which may be of interest for search:
Conductive hoses |
This place covers:
Recovery and use of naturally-occurring electricity or electrostatic charge, ex., lightning.
When the subject matter is the machine (normally a generator) that receives natural electrostatic charge and produces electric energy, H02N 1/00 or H02N 11/00 are relevant.
This place does not cover:
Devices or methods for influencing weather | |
Screening atmospheric or terrestrial radiations or fields | |
Lighter-than-air aircrafts (ex balloons) | |
Measurements related to lightning | |
Measuring atmospheric potential differences | |
Installation of lightning conductors |